GB2237992A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Soft tissue core biopsy instrument.
Assignee: Hart Enterprises Inc
•
Filing: 1989-11-14
•
Granted: —
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Expires: 2009-11-14
Abstract
No abstract record available.
Inventors
- 👤 Glenn Norton Taylor
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 00:56
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0266; A61B10/0275; A61B2010/0208
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
364 words
A soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received within said outer barrel member and which has a distal end and a proximal end; a cannula driver in said inner barrel member; a cannula extending distally from said inner barrel member, being fixed to said cannula driver, and having a distal tip, said cannula driver being slidably received and movable within said distal inner barrel member and said cannula extending a predetermined distance out of said distal end of said inner barrel member when the instrument is in an at rest condition; a stylet having a distal end, a distal end portion, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said cannula, said distal end portion having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet, said stylet hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said cannula, said stylet extending distally from said hub and within said cannula with said distal end poftion (a) being positioned within said cannula when the instrument is in an at-rest position and (b) extending distally of said distal tip of said cannula in position to capture a biopsy sample when the instrument is in a cocked position; biasing means within said inner barrel member for biasing said cannula driver toward the distal end of said inner barrel member; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted cocked position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; a trigger, associated with said latching means, for j 29 unlatching said latching means, said trigger, upon being actuated for unlatching of said latching means, allowing said biasing means to quickly return said cannula driver and said cannula to said at rest distally extending position thereof and 5 over said stylet distal end portion.
Claim 2
Dependent Claim
364 words
A soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received within said outer barrel member and which has a distal end and a proximal end; a cannula driver in said inner barrel member; a cannula extending distally from said inner barrel member, being fixed to said cannula driver, and having a distal tip, said cannula driver being slidably received and movable within said distal inner barrel member and said cannula extending a predetermined distance out of said distal end of said inner barrel member when the instrument is in an at rest condition; a stylet having a distal end, a distal end portion, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said cannula, said distal end portion having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet, said stylet hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said cannula, said stylet extending distally from said hub and within said cannula with said distal end poftion (a) being positioned within said cannula when the instrument is in an at-rest position and (b) extending distally of said distal tip of said cannula in position to capture a biopsy sample when the instrument is in a cocked position; biasing means within said inner barrel member for biasing said cannula driver toward the distal end of said inner barrel member; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted cocked position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; a trigger, associated with said latching means, for j 29 unlatching said latching means, said trigger, upon being actuated for unlatching of said latching means, allowing said biasing means to quickly return said cannula driver and said cannula to said at rest distally extending position thereof and 5 over said stylet distal end portion.
Claim 3
Dependent Claim
370 words
A soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received within said outer barrel member and which has a distal end and a proximal end; a cannula driver in said inner barrel member; a cannula extending distally from said inner barrel member, being fixed to said cannula driver, and having a distal tip, said cannula driver being slidably received and movable within said distal inner barrel member and said cannula extending a predetermined distance out of said distal end of said inner barrel member when the instrument is in an at-rest condition; a stylet having a distal end, a distal end portion, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said cannula, said distal end portion having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet; said hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said'cannula, said stylet extending distally from said hub and within said cannula with said distal end portion (a) being positioned within said cannula when the instrument is in an at-rest position and (b) extending distally of said distal tip of said cannula in position to capture a biopsy sample when the instrument is in a cocked position; biasing means within said inner barrel member for biasing said cannula driver toward the distal end of said inner barrel member; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; a trigger, associated with said latching means, for unlatching said latching means, said trigger, upon being actuated for unlatching of said latching means, allowing said 5 biasing means to quickly return said cannula driver and said cannula to said at rest distally extending position thereof and over said stylet distal end portion; and means for selectively limiting the distally extended position of said cannula.
Claim 4
Dependent Claim
370 words
A soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received within said outer barrel member and which has a distal end and a proximal end; a cannula driver in said inner barrel member; a cannula extending distally from said inner barrel member, being fixed to said cannula driver, and having a distal tip, said cannula driver being slidably received and movable within said distal inner barrel member and said cannula extending a predetermined distance out of said distal end of said inner barrel member when the instrument is in an at-rest condition; a stylet having a distal end, a distal end portion, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said cannula, said distal end portion having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet; said hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said'cannula, said stylet extending distally from said hub and within said cannula with said distal end portion (a) being positioned within said cannula when the instrument is in an at-rest position and (b) extending distally of said distal tip of said cannula in position to capture a biopsy sample when the instrument is in a cocked position; biasing means within said inner barrel member for biasing said cannula driver toward the distal end of said inner barrel member; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; a trigger, associated with said latching means, for unlatching said latching means, said trigger, upon being actuated for unlatching of said latching means, allowing said 5 biasing means to quickly return said cannula driver and said cannula to said at rest distally extending position thereof and over said stylet distal end portion; and means for selectively limiting the distally extended position of said cannula.
Claim 5
Dependent Claim
45 words
The instrument of claim 2 wherein said outer barrel member has a longitudinal slot therein, said inner barrel member has a longitudinal slot therein, and said cannula driver has a longitudinal slot therein, and said cannula position limiting means being received in said longitudinal slots.
Claim 6
Dependent Claim
32 words
The biopsy instrument of claim 2 wherein said cannula position limiting means comprise an elongate planar base portion having two sides and a pin extending from one side of said base portion.
Claim 7
Dependent Claim
26 words
The biopsy instrument of claim 4 wherein said pin has a width slightly less than one half of a longitudinal dimension of said elongate base portion.
Claim 8
Dependent Claim
31 words
The biopsy instrument of claim 5 wherein said longitudinal slot in said outer barrel member is bifurcated into two longitudinal slot sections and said pin fits snugly within either slot section.
Claim 9
Dependent Claim
31 words
The biopsy instrument of dlaim 4 wherein said base portion of said position limiting means is releasably fixed within a recess in the outer wall surface of said outer barrel member.
Claim 10
Dependent Claim
31 words
The biopsy instrument of dlaim 4 wherein said base portion of said position limiting means is releasably fixed within a recess in the outer wall surface of said outer barrel member.
Claim 11
Dependent Claim
45 words
S. The biopsy instrument of claims 7 wherein said position limiting means is removable from said recess whereby said pin can be positioned to extend into one or the other of said slot sections, and said base portion extends over and covers both slot sections.
Claim 12
Dependent Claim
410 words
A soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received 31 within said outer barrel member and which has a distal end and a proximal end, said proximal end including a proximal wall; a cannula driver located in said inner barrel member and having a proximal end and a distal end; 5 a cannula extending distally from said inner barrel member, being f ixed to said cannula driver, and having a distal tip, said cannula driver being slidably received and movable within said distal inner barrel member and said cannula extending a predetermined distance out of said distal end of said inner barrel member when the instrument is in an at-rest condition; a stylet having a distal end, a distal end portion, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said cannula, said distal end portion having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet; said stylet hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said cannula, said stylet extending distally from said hub and within said cannula with said distal end portion (a) being positioned within said cannula when the instrument is in an at-rest position and (b) extending distally of said distal tip of said cannula in position to capture a biopsy when the instrument is in a cocked position; biasing means within said inner'barrel member for biasing said cannula driver toward the distal end of said inner barrel member, said cannula driver biasing means comprising a spring located within said inner barrel member between said proximal wall of said inner barrel member and said proximal end of said cannula driver; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; a trigger, associated with said latching means, for upon being unlatching said latching means, said trigger, actuated for unlatching of said latching means, allowing said 1, 32 biasing means to quickly return said cannula driver and said cannula to said at rest distally extending position thereof and over said stylet distal end portion.
Claim 13
Dependent Claim
410 words
A soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received 31 within said outer barrel member and which has a distal end and a proximal end, said proximal end including a proximal wall; a cannula driver located in said inner barrel member and having a proximal end and a distal end; 5 a cannula extending distally from said inner barrel member, being f ixed to said cannula driver, and having a distal tip, said cannula driver being slidably received and movable within said distal inner barrel member and said cannula extending a predetermined distance out of said distal end of said inner barrel member when the instrument is in an at-rest condition; a stylet having a distal end, a distal end portion, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said cannula, said distal end portion having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet; said stylet hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said cannula, said stylet extending distally from said hub and within said cannula with said distal end portion (a) being positioned within said cannula when the instrument is in an at-rest position and (b) extending distally of said distal tip of said cannula in position to capture a biopsy when the instrument is in a cocked position; biasing means within said inner'barrel member for biasing said cannula driver toward the distal end of said inner barrel member, said cannula driver biasing means comprising a spring located within said inner barrel member between said proximal wall of said inner barrel member and said proximal end of said cannula driver; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; a trigger, associated with said latching means, for upon being unlatching said latching means, said trigger, actuated for unlatching of said latching means, allowing said 1, 32 biasing means to quickly return said cannula driver and said cannula to said at rest distally extending position thereof and over said stylet distal end portion.
Claim 14
Dependent Claim
30 words
The instrument of claim 9 wherein said proximal wall of said inner barrel member has a central throughbore therein within and through which said stylet hub may be slidably received.
Claim 15
Dependent Claim
56 words
The instrument of claim 9 wherein said cannula driver is a hollow tubular structure having said cannula mounted within said distal end thereof by a plug fictionally engaged within said tubular structure and wherein said proximal end of said cannula driver is open to allow sliding of the proximal end over and about said stylet hub.
Claim 16
Dependent Claim
38 words
The instrument of claim 9 wherein said spring has a diameter sufficient to allow said spring to slide over said stylet hub and to allow said spring to expand and contract within said inner barrel member without obstruction.
Claim 17
Dependent Claim
31 words
The instrument of claim 6 further including latching indicator means on said outer barrel member for indicating the slot section within which said pin of said position limiting means is received.
Claim 18
Independent Claim
542 words
A method for using a soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received within said outer barrel member and which has a distal end and a proximal end; a cannula driver in said inner barrel member; a cannula extending distally from said inner barrel member, being fixed to said cannula driver, and having a distal tip, said cannula driver being slidably received and movable within said distal inner barrel member and said cannula extending a predetermined distance out of said distal end of said inner barrel member when the instrument is in an at rest condition; a stylet having a distal end, a distal end portion, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said canula, said distal 33 end portion having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet; said stylet hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said cannula, said stylet extending distally from said hub and within said cannula with said distal end portion (a) positioned within said cannula when the instrument is in an at-rest position and (b) extending distally of said distal tip of said cannula in position to capture a biopsy sample when the instrument is in a cocked position; biasing means within said inner barrel member for biasing said cannula driver toward said distal end of said inner barrel member; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; and a trigger, associated with said latching means, for unlatching said latching means, said trigger, upon being actuated for unlatching of said latching means, allowing said biasing means to quickly return said cannula driver and said cannula to said at rest, distally extending position thereof and over said stylet distal end portion, said method including the steps of: I (a) maintaining the position of said inner distal barrel member with one hand, using thumb and forefinger of said one hand to maintain said position; (b) using remaining fingers of said one hand to move said outer barrel member proximally over said inner barrel;. (c) continuing to move said outer barrel member proximally until said latching means engage to latch said cannula driver in a proximal retracted cocked position; (d) sliding said outer proximal barrel member distally over said inner barrel member until returned to cause distal advancement of the stylet out of the cannula to expose a sampling notch on the distal end portion of said stylet; (e) positioning the distal end of said cannula and said 34 stylet within the body of a patient at a location where tissue is to be removed, with the instrument in a cocked condition; (f) and then pressing down on said trigger to unlatch said latching means to cause rapid distal advancement of said 5 cannula over said stylet distal end portion.-
Claim 19
Independent Claim
542 words
A method for using a soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received within said outer barrel member and which has a distal end and a proximal end; a cannula driver in said inner barrel member; a cannula extending distally from said inner barrel member, being fixed to said cannula driver, and having a distal tip, said cannula driver being slidably received and movable within said distal inner barrel member and said cannula extending a predetermined distance out of said distal end of said inner barrel member when the instrument is in an at rest condition; a stylet having a distal end, a distal end portion, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said canula, said distal 33 end portion having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet; said stylet hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said cannula, said stylet extending distally from said hub and within said cannula with said distal end portion (a) positioned within said cannula when the instrument is in an at-rest position and (b) extending distally of said distal tip of said cannula in position to capture a biopsy sample when the instrument is in a cocked position; biasing means within said inner barrel member for biasing said cannula driver toward said distal end of said inner barrel member; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; and a trigger, associated with said latching means, for unlatching said latching means, said trigger, upon being actuated for unlatching of said latching means, allowing said biasing means to quickly return said cannula driver and said cannula to said at rest, distally extending position thereof and over said stylet distal end portion, said method including the steps of: I (a) maintaining the position of said inner distal barrel member with one hand, using thumb and forefinger of said one hand to maintain said position; (b) using remaining fingers of said one hand to move said outer barrel member proximally over said inner barrel;. (c) continuing to move said outer barrel member proximally until said latching means engage to latch said cannula driver in a proximal retracted cocked position; (d) sliding said outer proximal barrel member distally over said inner barrel member until returned to cause distal advancement of the stylet out of the cannula to expose a sampling notch on the distal end portion of said stylet; (e) positioning the distal end of said cannula and said 34 stylet within the body of a patient at a location where tissue is to be removed, with the instrument in a cocked condition; (f) and then pressing down on said trigger to unlatch said latching means to cause rapid distal advancement of said 5 cannula over said stylet distal end portion.-
Claim 20
Dependent Claim
39 words
The method of claim 14 including the further step of: (g) detaching said stylet hub from said proximal outer barrel member and pulling the hub proximally out of said instrument to remove said stylet proximally from within said instrument.
Claim 21
Dependent Claim
37 words
The method of claim 14 including the steps of providing a spring for said biasing means and placing said spring between a proximal wall of said inner barrel member and a proximal end of said cannula driver.
Claim 22
Dependent Claim
41 words
The method of claim 14 including the steps of providing a spring for said biasing means and placing said spring between a distal end of said cannula and a stop in and at said distal end of said inner barrel member.
Claim 23
Dependent Claim
363 words
A soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received within said outer barrel member, which has a distal end and a proximal end and which has a stop in said distal end; a cannula driver in said inner barrel member; a cannula extending distally from said inner Iarrel member, being fixed to said cannula driver, and having a distal tip, said cannula driver being slidably received in and movable within said inner barrel member and said cannula extending a predetermined distance out of a distal end of said inner barrel member when the instrument is in an at rest condition; a stylet having a distal end, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said cannula, said distal end having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet; said stylet hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said cannula, said stylet extending distally from said hub and within said cannula and having a distal tip portion (a) positioned within said cannula when the instrument is in an at rest position and (b) extending distally of said distal tip of said cannula in position to capture a biopsy sample when the instrument is in a cocked condition; biasing means within said inner barrel member between said stop and said cannula driver for biasing said cannula driver; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted cocked position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; and a trigger, associated with said latching means, for unlatching said latching means, said trigger, upon being actuated for unlatching of said latching means, allowing saId biasing means to quickly return said cannula driver and said cannula to said distally extending position thereof and over said stylet distal tip portion. 20
Claim 24
Dependent Claim
363 words
A soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received within said outer barrel member, which has a distal end and a proximal end and which has a stop in said distal end; a cannula driver in said inner barrel member; a cannula extending distally from said inner Iarrel member, being fixed to said cannula driver, and having a distal tip, said cannula driver being slidably received in and movable within said inner barrel member and said cannula extending a predetermined distance out of a distal end of said inner barrel member when the instrument is in an at rest condition; a stylet having a distal end, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said cannula, said distal end having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet; said stylet hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said cannula, said stylet extending distally from said hub and within said cannula and having a distal tip portion (a) positioned within said cannula when the instrument is in an at rest position and (b) extending distally of said distal tip of said cannula in position to capture a biopsy sample when the instrument is in a cocked condition; biasing means within said inner barrel member between said stop and said cannula driver for biasing said cannula driver; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted cocked position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; and a trigger, associated with said latching means, for unlatching said latching means, said trigger, upon being actuated for unlatching of said latching means, allowing saId biasing means to quickly return said cannula driver and said cannula to said distally extending position thereof and over said stylet distal tip portion. 20
Claim 25
Dependent Claim
23 words
The instrument of claim 18 further including latching indicator means on said proximal outer barrel member for indicating when said trigger is latched.
Claim 26
Dependent Claim
23 words
The instrument of claim 18 wherein said trigger is mounted to said inner barrel member and extends distally over said outer barrel member.
Claim 27
Dependent Claim
46 words
The instrument of claim 18'wherein said inner barrel member has at least one lateral longitudinal slot and said cannula driver has a slot therein adapted to be aligned with said longitudinal slot, and said instrument includes at least one pin slidably received in said aligned slots.
Claim 28
Dependent Claim
73 words
The instrument of claim 18 wherein said inner barrel member includes a distal nose plug that has a proximal end which extends into the inner barrel member and which includes first and second inwardly stepped portions, wherein a distal end of said cannula driver includes first and second inwardly stepped portions, and wherein said biopsy means extends between said proximal end of said nose plug and said distal end of said cannula driver.
Claim 29
Dependent Claim
36 words
The instrument of claim 22 wherein said second I 36 inwardly stepped portion of said cannula driver abuts against said second inwardly stepped portion of said plug when the instrument is in an at rest condition.
Claim 30
Dependent Claim
41 words
The instrument of claim 23 wherein said first inwardly stepped portions of said cannula driver and of said plug, respectively, are threaded and are separated from one another by said second inwardly stepped portions of said plug and said cannula driver.
Claim 31
Dependent Claim
61 words
The instrument of claim 24 wherein said biasing means comprise a spring which is threadedly received over and fixed, at one end thereof, to said first inwardly stepped portion of said plug and at the other end thereof to said first inwardly stepped portion of said cannula driver, said spring being contracted when the instrument is in an at rest condition.
Claim 32
Dependent Claim
33 words
The instrument of claim 25 wherein said second inwardly stepped portions of said cannula driver and of said plug are received within central coils of said spring and are movable within said coils.
Claim 33
Dependent Claim
80 words
The instrument of claim 19 wherein said trigger is an elongate member which extends outwardly from and then proximally and generally parallel to said inner barrel member to a f ree end, said f ree end having a detent which extends therefrom toward said stylet in said instrument and which rides on and along an outer surface of said proximal outer barrel member within a longitudinal slot in said outer barrel member which defines part of said latching indicator means.
Claim 34
Dependent Claim
105 words
The instrument of claim 21 wherein said inner barrel member has an opening extending through a sidewall thereof and said cannula driver has a flap cut thereinto, said flap having a free end with a detent thereon extending laterally outwardly therefrom and being aligned with said opening in said inner barrel member when said outer barrel member is pulled proximally, pulling said cannula driver proximally therewith by means of engagement of said at least one pin in said aligned slots, said flap and said opening forming said latching means for the instrument for holding said cannula driver proximally against the action of said biasing means.
Claim 35
Dependent Claim
85 words
The instrument of claim 28 wherein said opening in said inner barrel member is aligned directly beneath an opening i !I i i 37 in the sidewall of said proximal outer barrel member which opens into said longitudinal slot defining part of said latching indicator means on said outer barrel member and wherein said detent of said trigger rests in said opening in said outer barrel member when said outer barrel member is at its most proximal, at rest position, over said inner barrel member.
Claim 36
Dependent Claim
71 words
The instrument of claim 29 wherein said detent on said trigger is arranged to push. upon a downward force being applied thereto, said flap of said cannula driver out of engagement with said opening in said inner barrel member to release said latching action thereof and to allow said biasing means to act upon said cannula driver to propel same rapidly over said distal end of said stylet of said instrument.
Claim 37
Dependent Claim
76 words
The instrument of claim 18 wherein said proximal outer barrel member has a proximal end wall with an aperture therein through which said stylet hub extends, said stylet hub is longitudinally bifurcated at its proximal end to provide two proximally extending flexible legs, each leg having a laterally outwardly extending rib which coacts with a portion of said end wall of said proximal outer barrel member adjacent said aperture for holding said stylet in said instrument.
Claim 38
Dependent Claim
66 words
The instrument of claim 31 wherein said legs of said hub also have laterally outwardly extending wings which can be flexed inwardly toward one another to flex said legs inwardly and release said ribs from their position adjacent said end wall of and within said proximal outer barrel member to allow said stylet hub to be withdrawn proximally from within said proximal outer barrel member. 30
Claim 39
Dependent Claim
56 words
The instrument of claim 31 including alignment means on said stylet hub and in said proximal outer barrel member which coact to align the rotational position of the stylet mounted on said stylet hub relative to the rotational position of said cannula so that pointed ends of said stylet and said cannula are rotationally oppositely disposed.
Claim 40
Dependent Claim
43 words
The instrument of claim 18 wherein a pin extends through aligned openings in the walls of said inner barrel member, of said outer barrel member and of said cannula driver to maintain said barrel members and said cannula driver i 38 slidably united.
Claim 41
Independent Claim
541 words
A method for using a soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received within said outer barrel member, which has a distal end and a proximal end and which has a stop in said distal end; a cannula driver in said inner barrel member; a cannula extending distally from said inner barrel member, being fixed to said cannula driver, and having a distal tip, said cannula driver being slidably received in and movable within said inner barrel member and said cannula extending a predetermined distance out of a distal end of said inner barrel member when the instrument is in an at rest condition; a stylet having a distal end, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said cannula, said distal end having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet; said stylet hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said cannula, said stylet extending distally from said hub and within said cannula and having a distal tip portion (a) positioned within said cannula when the instrument is in an at rest osition and (b) extending distally of said distal tip of said cannula in position to capture a biopsy sample when the instrument is in a cocked condition; biasing means within said inner barrel member between said stop and said cannula driver for biasing said cannula driver; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted cocked position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; and a trigger, associated with said latching means, for unlatching said latching means, said trigger, upon being actuated for unlatching of said latching means, allowing said 1 39 biasing means to quickly return said cannula driver and said cannula to said distally extending position thereof and over said stylet distal tip portion, said method including the steps of: (a) maintaining the position of said inner distal barrel member with one hand, using thumb and forefinger of said one hand to maintain said position; (b) using remaining fingers of said one hand to move said outer barrel member proximally over said inner barrel; (c) continuing to move said outer barrel member proximally until said latching means engage to latch said cannula driver in a proximal retracted cocked position; (d) sliding said outer proximal barrel member distally over said inner barrel member to cause distal advancement of the stylet out of the cannula to expose a sampling notch on the distal end portion of said stylet, (e) positioning the distal end of said cannula and said stylet within the body of a patient at a location where tissue is to be removed with the instrument in a cocked condition; 20 (f) and then pressing down on said trigger to unlatch said latching means to cause rapid distal advancement of said cannula over said stylet distal end portion.
Claim 42
Independent Claim
541 words
A method for using a soft tissue core biopsy instrument comprising: a proximal outer barrel member having a distal end and a proximal end; a distal inner barrel member which is slidably received within said outer barrel member, which has a distal end and a proximal end and which has a stop in said distal end; a cannula driver in said inner barrel member; a cannula extending distally from said inner barrel member, being fixed to said cannula driver, and having a distal tip, said cannula driver being slidably received in and movable within said inner barrel member and said cannula extending a predetermined distance out of a distal end of said inner barrel member when the instrument is in an at rest condition; a stylet having a distal end, a proximal end, and being removably received in said outer barrel, in said inner barrel, and in said cannula, said distal end having a biopsy sample receiving notch therein; a stylet hub mounted to said proximal end of said stylet; said stylet hub being removably attached to the proximal end of said proximal outer barrel member to enable multiple biopsies to be obtained with one insertion of said cannula, said stylet extending distally from said hub and within said cannula and having a distal tip portion (a) positioned within said cannula when the instrument is in an at rest osition and (b) extending distally of said distal tip of said cannula in position to capture a biopsy sample when the instrument is in a cocked condition; biasing means within said inner barrel member between said stop and said cannula driver for biasing said cannula driver; latching means associated with said cannula driver and said inner barrel member for latching said cannula driver in a proximally retracted cocked position within said outer barrel member and said inner barrel member against the biasing action of said biasing means; and a trigger, associated with said latching means, for unlatching said latching means, said trigger, upon being actuated for unlatching of said latching means, allowing said 1 39 biasing means to quickly return said cannula driver and said cannula to said distally extending position thereof and over said stylet distal tip portion, said method including the steps of: (a) maintaining the position of said inner distal barrel member with one hand, using thumb and forefinger of said one hand to maintain said position; (b) using remaining fingers of said one hand to move said outer barrel member proximally over said inner barrel; (c) continuing to move said outer barrel member proximally until said latching means engage to latch said cannula driver in a proximal retracted cocked position; (d) sliding said outer proximal barrel member distally over said inner barrel member to cause distal advancement of the stylet out of the cannula to expose a sampling notch on the distal end portion of said stylet, (e) positioning the distal end of said cannula and said stylet within the body of a patient at a location where tissue is to be removed with the instrument in a cocked condition; 20 (f) and then pressing down on said trigger to unlatch said latching means to cause rapid distal advancement of said cannula over said stylet distal end portion.
Claim 43
Dependent Claim
39 words
The method of claim 35 including the further steps of: (g) detaching said stylet hub from said proximal outer barrel member; and, (h) pulling the hub proximallybut of said instrument to remove said stylet proximally from within said instrument.
Claim 44
Dependent Claim
151 words
A soft tissue core biopsy instrument comprising: a proximal outer barrel member and a distal inner member which is slidably received within said outer barrel member, a cannula driver slidably received within the distal inner barrel member and having a distally extending cannula fixed thereto, a stylet slidably received in said instrument, having an outer, biopsy capturing, distal end portion, and extending from a stylet hub removably attached to the proximal outer barrel member, a spring positioned within said instrument for biasing said cannula driver forwardly, latching means for latching said cannula driver in a proximally retracted, cocked position against the action of said spring, and a trigger for unlatching said latching means to allow said spring to quickly return to its at rest position and at the same time to f orce said cannula driver to a distally extended position to move said cannula over said stylet distal end portion.
Claim 45
Dependent Claim
151 words
A soft tissue core biopsy instrument comprising: a proximal outer barrel member and a distal inner member which is slidably received within said outer barrel member, a cannula driver slidably received within the distal inner barrel member and having a distally extending cannula fixed thereto, a stylet slidably received in said instrument, having an outer, biopsy capturing, distal end portion, and extending from a stylet hub removably attached to the proximal outer barrel member, a spring positioned within said instrument for biasing said cannula driver forwardly, latching means for latching said cannula driver in a proximally retracted, cocked position against the action of said spring, and a trigger for unlatching said latching means to allow said spring to quickly return to its at rest position and at the same time to f orce said cannula driver to a distally extended position to move said cannula over said stylet distal end portion.
Claim 46
Dependent Claim
15 words
A soft tissue core biopsy instrument substantially as described with reference to the accompanying drawings.
Claim 47
Dependent Claim
15 words
A soft tissue core biopsy instrument substantially as described with reference to the accompanying drawings.
Claim 48
Independent Claim
68 words
A method of using a soft tissue core biopsy instrument to capture a biospy sample substantially as described with reference to the accompanying drawings. Published 1991 at'fbe Patent Oflice. State House. 66/71 High Holborn. London WC I R4'M- Further copies maybe obtained from Sake Branch. Unit 6. Nine M11c Pk)inL Cwmiehnfach. Cross Keys. Newport NPI 7HZ. Printed by Multiplex techniques Rd. St Mary Cray. Kent. 1 i i
Claim 49
Independent Claim
68 words
A method of using a soft tissue core biopsy instrument to capture a biospy sample substantially as described with reference to the accompanying drawings. Published 1991 at'fbe Patent Oflice. State House. 66/71 High Holborn. London WC I R4'M- Further copies maybe obtained from Sake Branch. Unit 6. Nine M11c Pk)inL Cwmiehnfach. Cross Keys. Newport NPI 7HZ. Printed by Multiplex techniques Rd. St Mary Cray. Kent. 1 i i
References Cited (Backward Citations)
US4735215A
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